[Solved] Identify the bug in this Ruby code using metaprogramming:class Example def self.create_methods(*names) names.... | Ruby

Ruby - Metaprogramming Fundamentals

Identify the bug in this Ruby code using metaprogramming:

class Example
  def self.create_methods(*names)
    names.each do |name|
      define_method(name) { "Hello #{name}" }
    end
  end

  create_methods(:foo, :bar)
end

ex = Example.new
puts ex.foo
puts ex.bar

Adefine_method called in class method without proper receiver

BMissing parentheses in method call create_methods

CUsing string interpolation inside define_method block is invalid

DCannot pass multiple arguments to create_methods

Step-by-Step Solution

Solution:

Step 1: Check where define_method is called
define_method is called inside a class method without specifying receiver, so it tries to define class method but actually needs instance context.
Step 2: Fix scope for define_method
To define instance methods, define_method must be called on the class's singleton class or inside instance context.
Final Answer:
define_method called in class method without proper receiver -> Option A
Quick Check:
define_method scope error = class method context [OK]

Quick Trick: Call define_method on class's instance context, not directly in class method [OK]

Common Mistakes:

Assuming define_method works anywhere without receiver
Thinking string interpolation is invalid in blocks
Believing multiple arguments cause error

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Identify the bug in this Ruby code using metaprogramming:

Step 1: Check where define_method is called

Step 2: Fix scope for define_method

Final Answer:

Quick Check:

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